Re: [rules-users] Smart Templates

I get this exception: Exception in thread "main" org.drools.runtime.rule.ConsequenceException: rule: RFI1 at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:927) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:856) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1071) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:785) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:751) at org.drools.template.parser.TemplateDataListener.finishSheet(TemplateDataListener.java:121) at org.drools.template.DataProviderCompiler.finishData(DataProviderCompiler.java:100) at org.drools.template.DataProviderCompiler.processData(DataProviderCompiler.java:95) at org.drools.template.DataProviderCompiler.compile(DataProviderCompiler.java:73) at org.drools.template.ObjectDataCompiler.compile(ObjectDataCompiler.java:44) at org.drools.examples.decisiontable.TemplateParser.<init>(TemplateParser.java:33) at org.drools.examples.decisiontable.TemplateParser.main(TemplateParser.java:18) Caused by: java.lang.RuntimeException: [Error: unable to resolve method: java.util.HashMap.value() [arglength=0]] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.drools.template.parser.DefaultGenerator.generate(DefaultGenerator.java:73) at org.drools.template.parser.Rule_RFI1_0.defaultConsequence(Rule_RFI1_0.java:7) at org.drools.template.parser.Rule_RFI1_0DefaultConsequenceInvoker.evaluate(Rule_RFI1_0DefaultConsequenceInvoker.java:30) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917) ... 11 more Caused by: [Error: unable to resolve method: java.util.HashMap.value() [arglength=0]] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:932) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:592) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:311) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:137) My rule template is virtually the same (name is a literal): rule "[hidden email]<http://user/SendEmail.jtp?type=node&node=3010031&i=0> }" when $service:ServiceBean(name == "DiscountCurve", value == "@{value}") $riskType:RiskType() then $riskType.setName("@{type}"); $riskType.setValue("@{value}"); end template ------------------------------ *From:* Wolfgang Laun-2 [via Drools] [mailto:[hidden email]<http://user/SendEmail.jtp?type=node&node=3010031&i=1>] *Sent:* 01 June 2011 10:33 *To:* Mullard, Christopher *Subject:* Re: [rules-users] Smart Templates There is a way, provided the required information is available at the time the rule is created. There is a detailed section in the Expert manual explaining how to call template expansion with either a Collection of Map objects or a Collection of JavaBean objects. Taking beans, you would have ServiceBean( String name, String value ) String getName String getValue String getType(){   if( "AAA".equals( value ) ) return "Type1";   if( "XYZ".equals( value ) ) return "Type2";   ... } You create a collection of such Objects, and call the expander for a template like this: rule &quot;DC_(a){row.rowNumber}&quot; when   $service: Service(name == "@{service}", value == "@{value}")   $riskType: RiskType() then   $riskType.setName("@{type}");   $riskType.setAtt(0,"@{value}"); end -W 2011/6/1 ChrisMu <[hidden email]<http://user/SendEmail.jtp?type=node&node=3009984&i=0> > > So in essence, there's no way to use a function to insert a string literal > into a rule from a template? > > ------------------------------ > *From:* FrankVhh [via Drools] [mailto:[hidden email]<http://user/SendEmail.jtp?type=node&node=3009838&i=0>] > > *Sent:* 31 May 2011 17:20 > *To:* Mullard, Christopher > *Subject:* RE: Smart Templates > > But then that would call the service.getType() method when the rule is > run wouldn't it? > -> Yes >  > I'm trying create explicit, simple rules to avoid doing extra work when > running data through them. > -> OK, in essence, I like that :-) >  > How would you use a rule to set the value within another rule? > -> I am not sure that I follow you here... > If you want to avoid to execute the getType()-service at rule execution, > then you would need to add an attribute name to your object, and call > getType() before creating the rules. > > Alternatively, you can insert an intermediate value whose value will be > set by another rule and then use this intermediate value in your DC rules. > > When > Service(value = "AAA") > Then > String name = "Type1"; > insert(name); > > Something like this... but make sure not to create a loop :-) > > Regards, > Frank > > ChrisMu wrote: > But then that would call the service.getType() method when the rule is > run wouldn't it? >  > I'm trying create explicit, simple rules to avoid doing extra work when > running data through them. >  > How would you use a rule to set the value within another rule? >  > Thanks > Chris > > ________________________________ > > From: FrankVhh [via Drools] > [mailto:[hidden email]<http://user/SendEmail.jtp?type=node&node=3006773&i=0>] > > Sent: 31 May 2011 16:48 > To: Mullard, Christopher > Subject: Re: Smart Templates > > > Hi, > > The way I see it, this is the way your template should look like. I do > not see the need to use eval() at all. > > rule "DC_0" > when >   $service: Service(name == "@{service}", value == "@{value}") >   $riskType: RiskType() > then >   $riskType.setName($service.getType("@{value}")); >   $riskType.setAtt(0,"@{value}"); > end > > I am assuming that RiskType is already inserted in WM, but you could > just as well create a new object in the then-part of the rule. > > In stead of using the java-function to determine the name, you might > actually just as well create an other rule that sets the name according > to the value, thus putting the entire decision logic in rules. > > Hope this helps. > > Regards, > Frank > > > >     ChrisMu wrote: >     Hi, >     >      I'm trying to get a template (.drt) to generate 2 rules > (.drl) > from 2 datasets but by doing a little bit more work than direct > substitution. >     >     Data (service,value): >     DC, AAA >     DC, XYZ >     >     Idea for the template - if value is of type1 then create Type > object with 'Type1' as name. If value is of type2, use 'Type2' as name: >     >     rule &quot;DC_(a){row.rowNumber}&quot; >     when >       Service(name == "DC")   >     then >       Type.setName(eval(Service.getType(@{value}))) >       Type.setAtt(0,@{value}) >     end template >     >     eval(Service.getType(@{arg0})) should take 'AAA' or 'XYZ' etc > as > arg and return a string Type1/Type2 etc. >     >     This would then generate 2 rules that look like: >     >     rule "DC_0" >     when >       Service(name == "DC", value == "AAA")   >     then >       RiskType.setName("Type1") >       RiskType.setAtt(0,"AAA") >     >     rule "DC_1" >     when >       Service(name == "DC", value == "XYZ")   >     then >       RiskType.setName("Type2") >       RiskType.setAtt(0,"XYZ") >     >     ...is this possible at all? I'm trying to avoid the eval step > being done in the actual rule (.drl) . >     >     Thanks >     >     Chris > > > > ________________________________ > > If you reply to this email, your message will be added to the discussion > below: > http://drools.46999.n3.nabble.com/Smart-Templates-tp3006479p3006589.html > > To unsubscribe from Smart Templates, click here > <http://drools.46999.n3.nabble.com/template/NamlServlet.jtp?macro=unsubs > cribe_by_code&node=3006479&code=Y2hyaXN0b3BoZXIubXVsbGFyZEBjcmVkaXQtc3Vp > c3NlLmNvbXwzMDA2NDc5fDE5NzczMDY1MzE=> . > > =============================================================================== > > Please access the attached hyperlink for an important electronic > communications disclaimer: > http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html > =============================================================================== > > > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://drools.46999.n3.nabble.com/Smart-Templates-tp3006479p3006773.html > To unsubscribe from Smart Templates, click here. > > > ============================================================================== > Please access the attached hyperlink for an important electronic > communications disclaimer: > http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html > > ============================================================================== > > > ------------------------------ > View this message in context: RE: Smart Templates<http://drools.46999.n3.nabble.com/Smart-Templates-tp3006479p... > Sent from the Drools: User forum mailing list archive<http://drools.46999.n3.nabble.com/Drools-User-forum-f47000.htm... 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